Add video embed feature to splashpage (#74)

* Add video embed feature to splashpage

Allows admins to configure a video URL that will be displayed on the
conference splashpage with autoplay. Supports multiple video platforms:
YouTube, Vimeo, PeerTube, and Invidious.

Features:
- Multi-platform video support with automatic platform detection
- Video autoplay with mute for browser compatibility
- Responsive 16:9 aspect ratio video player
- Extensible architecture for adding new platforms
- Full i18n support (English and Spanish)
- Comprehensive model tests

Implementation:
- Add video_url field to splashpages table
- Platform detection using regex patterns
- Automatic embed URL generation with autoplay parameters
- Admin form with video URL field and validation
- Model validations for URL format and supported platforms

Closes #8

* Update concurrent-ruby

Author: davidsf

Gemfile.lock

@@ -169,7 +169,7 @@ GEM
       rest-client (>= 2.0.0)
     cocoon (1.2.15)
     colorize (0.8.1)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.4)
     countable-rails (0.0.1)
       railties (>= 3.1)
     crack (0.4.5)

app/assets/stylesheets/osem-splash.scss

@@ -173,6 +173,26 @@
       color: white;
     }
   }
+
+  #video {
+    .video-wrapper {
+      position: relative;
+      padding-bottom: 56.25%; /* 16:9 aspect ratio */
+      padding-top: 25px;
+      height: 0;
+      max-width: 1080px;
+      margin: 0 auto;
+
+      iframe {
+        position: absolute;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        border: none;
+      }
+    }
+  }
 }
 
 .publicorprivate {

app/controllers/admin/splashpages_controller.rb

@@ -50,7 +50,8 @@ def splashpage_params
                                          :include_venue, :include_registrations,
                                          :include_tickets, :include_lodgings,
                                          :include_sponsors, :include_social_media,
-                                         :include_booths, :include_past_editions)
+                                         :include_booths, :include_past_editions,
+                                         :video_url)
     end
   end
 end

app/models/splashpage.rb

@@ -4,4 +4,109 @@ class Splashpage < ApplicationRecord
   belongs_to :conference
 
   has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }
+
+  validates :video_url,
+            format: { with: URI::regexp(%w(http https)), message: :invalid_url },
+            allow_blank: true
+
+  validate :video_url_is_supported_platform, if: :video_url?
+
+  # Configuration for supported video platforms
+  # To add a new platform: add an entry with patterns (regex) and embed_template
+  SUPPORTED_PLATFORMS = {
+    youtube: {
+      patterns: [
+        /(?:youtube\.com\/watch\?v=|youtu\.be\/|youtube\.com\/embed\/|m\.youtube\.com\/watch\?v=)([a-zA-Z0-9_-]{11})/
+      ],
+      embed_template: 'https://www.youtube.com/embed/%{video_id}',
+      autoplay_params: 'autoplay=1&loop=1&mute=1&controls=0&disablekb=1&fs=0&iv_load_policy=3&modestbranding=1&playsinline=1'
+    },
+    vimeo: {
+      patterns: [/vimeo\.com\/(?:video\/)?(\d+)/],
+      embed_template: 'https://player.vimeo.com/video/%{video_id}',
+      autoplay_params: 'autoplay=1&muted=1&loop=1&playsinline=1'
+    },
+    peertube: {
+      patterns: [
+        /(https?:\/\/[^\/]+)\/videos\/watch\/([a-zA-Z0-9-]+)/,
+        /(https?:\/\/[^\/]+)\/w\/([a-zA-Z0-9-]+)/
+      ],
+      embed_template: '%{instance_url}/videos/embed/%{video_id}',
+      autoplay_params: 'autoplay=1&loop=1'
+    },
+    invidious: {
+      patterns: [/(https?:\/\/[^\/]+)\/watch\?v=([a-zA-Z0-9_-]{11})/],
+      embed_template: '%{instance_url}/embed/%{video_id}',
+      autoplay_params: 'autoplay=1&loop=1'
+    }
+  }.freeze
+
+  # Detect platform from video URL
+  def video_platform
+    return nil unless video_url.present?
+
+    SUPPORTED_PLATFORMS.find do |platform, config|
+      config[:patterns].any? { |pattern| video_url.match?(pattern) }
+    end&.first
+  end
+
+  # Extract video ID from URL
+  def video_id
+    match_data = url_match_data
+    return nil unless match_data
+
+    # For federated platforms (PeerTube, Invidious), video_id is the second capture
+    match_data.captures.length > 1 ? match_data[2] : match_data[1]
+  end
+
+  # Extract instance URL for federated platforms (PeerTube, Invidious)
+  def video_instance_url
+    return nil unless [:peertube, :invidious].include?(video_platform)
+
+    match_data = url_match_data
+    match_data&.captures&.length.to_i > 1 ? match_data[1] : nil
+  end
+
+  # Generate complete embed URL with autoplay parameters
+  def video_embed_url
+    return nil unless video_platform && video_id
+
+    config = SUPPORTED_PLATFORMS[video_platform]
+    base_url = build_base_url(config)
+
+    "#{base_url}?#{config[:autoplay_params]}"
+  end
+
+  private
+
+  # Get regex match data for the current video URL
+  def url_match_data
+    return nil unless video_url.present? && video_platform.present?
+
+    config = SUPPORTED_PLATFORMS[video_platform]
+    config[:patterns].each do |pattern|
+      match = video_url.match(pattern)
+      return match if match
+    end
+
+    nil
+  end
+
+  # Build base embed URL from template
+  def build_base_url(config)
+    template = config[:embed_template]
+
+    if [:peertube, :invidious].include?(video_platform)
+      template % { instance_url: video_instance_url, video_id: video_id }
+    else
+      template % { video_id: video_id }
+    end
+  end
+
+  # Validation: ensure URL is from a supported platform
+  def video_url_is_supported_platform
+    return if video_platform.present?
+
+    errors.add(:video_url, :unsupported_platform)
+  end
 end

app/views/admin/splashpages/_form.html.haml

@@ -45,6 +45,16 @@
     %label
       = f.check_box :include_social_media
       Display the social media links?
+  %h4
+    = t('admin.splashpages.form.video.title')
+  %hr
+  .form-group
+    = f.label :video_url
+    = f.url_field :video_url,
+                  class: 'form-control',
+                  placeholder: t('admin.splashpages.form.video.placeholder')
+  %p.help-block
+    = t('admin.splashpages.form.video.help_html').html_safe
   %h4
     Access
   %hr

app/views/conferences/_video.haml

@@ -0,0 +1,14 @@
+- cache [splashpage, splashpage.video_url, '#splash#video'] do
+  - if splashpage.video_embed_url.present?
+    %section#video
+      .container
+        .row
+          .col-md-8.col-md-offset-2
+            .video-wrapper
+              %iframe#video-iframe{
+                src: splashpage.video_embed_url,
+                frameborder: "0",
+                allowfullscreen: "",
+                allow: "accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share",
+                title: "Conference Video"
+              }

app/views/conferences/show.html.haml

@@ -24,6 +24,9 @@
   -# header/description
   = render 'header', conference: @conference, venue: @conference.venue
 
+  -# Video section
+  = render 'video', splashpage: @conference.splashpage
+
   -# calls for content, or program
   - if @conference.splashpage.include_cfp
     = render 'call_for_content', conference: @conference,

config/locales/en.yml

@@ -48,3 +48,12 @@ en:
         nickname: Nickname
         biography: Biography
         affiliation: Affiliation
+      splashpage:
+        video_url: Video URL
+    errors:
+      models:
+        splashpage:
+          attributes:
+            video_url:
+              invalid_url: must be a valid URL
+              unsupported_platform: must be from a supported platform (Youtube, Vimeo, Peertube, Invidious)

config/locales/es.yml

@@ -13,3 +13,12 @@ es:
         nickname: Nickname
         biography: Biografía
         affiliation: Afiliación
+      splashpage:
+        video_url: URL del vídeo
+    errors:
+      models:
+        splashpage:
+          attributes:
+            video_url:
+              invalid_url: debe ser una URL válida
+              unsupported_platform: debe ser de una plataforma soportada (Youtube, Vimeo, Peertube, Invidious)

config/locales/views/splashpages/en.yml

@@ -0,0 +1,12 @@
+en:
+  admin:
+    splashpages:
+      form:
+        video:
+          title: Video
+          label: Video URL
+          placeholder: "https://www.youtube.com/watch?v=..."
+          help_html: |
+            Video URL to display on the splash page (will autoplay muted).
+            <br>
+            Supported: <strong>YouTube, Vimeo, PeerTube, Invidious</strong>